Be careful that your cape does not put a resistive load on those pins.  I 
had an LED switching network connected to Pin 8.44.
This causes the BBB to not boot.

I don't have my documentation with me, but there are several pins which 
have this property.

I added a series resistor, I think about 50kohm, which allows the LED 
switch circuit to work, but decreased the load enough for the boot process 
to proceed successfully.

I was using a BJT switching circuit.  A MOSFET switch with very high input 
resistance would not have caused this type of problem.

Regards,
Greg


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